Synthetic Material (Not A Rock Or Mineral)

Green Calcite

Calcium Carbonate (CaCO3)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Moss Agate / Carnelian Agate

Silicon Dioxide (SiO2) with iron and manganese inclusions

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Sandstone

Arenite (Clastic Sedimentary Rock)

Marble

Metamorphosed Limestone/Dolomite

Druzy Quartz Geode (Vug)

Silicon Dioxide (SiO2)

Granite

Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)

Chondrite Meteorite

Ordinary Chondrite (L or H Type)

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))

Greenschist

Greenschist (chlorite-epidote schist)

Septarian Nodule

Septarian Concretion (Complex of Calcite, Aragonite, and Limestone/Mudstone)

Basalt with Calcite Veins

Aphanitic mafic volcanic rock with CaCO3 inclusions

Biotite (Mica)

Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Milky Quartz

Silicon Dioxide (SiO2)

River Rock (Greywacke/Sandstone)

Lithic Wacke

Amber

Succinite (fossilized resin)

Druzy Quartz on Sandstone

Silicon Dioxide (SiO2) with Quartz crystals

Clear Quartz Crystal (Herkimer Diamond style)

Silicon Dioxide (SiO2)

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Petrified Wood

Silicified wood (SiO2 - Silicon Dioxide)

Coquina

Biogenic Limestone (Calcite, CaCO3)

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Granite

Granite (a common igneous rock)

Sandstone (Quartzite texture)

Arenite (SiO2 secondary)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Granite fragment

Granite (Felsic Plutonic Rock)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Jasper (Brown Iron-Rich Variety)

Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)

Chert with Druzy Quartz Geode

Microcrystalline Quartz (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)